Repeat mechanism for typewriters



Aug. 23, 1932. o. A. HOKANSON 1,873,406

' REPEAT MECHANISM FOR TYPEWRITERS I Filed Nov. 23, 1925 Patented Aug. 23, 1932 OTTO A. HOKAHSON, F WOODSTOCK, ILLINOIS, ASSIGNOR T0 WOODSTUCK TYPEWRITEB GOHPANY, 01E 'WQODSTOCK, ILLINOIS, A GQRPORATIQN OF ILLINQIS REZPEQT MECHANISM FOR TYPEWRITWS Application filed November 23, 1925. Serial No. 703%.

desired without the necessity of repeating the operation of the key controlling the particular impression.

A further object of the invention is to provide means of the class named which shall n be of improved construction and operation.

The invention is exemplified in the combination and arrangement of parts shown in the accompanying drawing and described in the following specification and it is more particularly pointed out in the appended claims.

as thereto Fig. 2 is a fragmentary horizontal sectional view showing a portion of the mechanism 1n plan.

Referring first to Figs. 1 and 2, the numeral 1O designates a typewriter frame having a power driven toothed'cylinder 11 journaled therein transversely of the frame. The typewriter is provided with the usual type bars 12 having sublever's 13 pivotally mounted at 14 on a cross-bar 15. Pivotally connected at 16 to each of the sublevers 13 is an actuator 17 provided with atooth '18 for engaging the toothed cylinder 11. A key lever 19 is provided for each actuator having a contact finger 20 arranged to engage .1

lug 21 on the actuator and press the actuator downwardly to cause the tooth 18 to engage the rotating cylinder 11. The cylinder 11 is continuously driven by means of a motor or other suitable power drive. A slight depression of a key lever 19 will connect the actuator with the power drive and operate the corresponding type bar 12. At the forward movement of the actuator the face 22 k thereof will engage an adjustable screw 23 to disconnect the actuator from the power drive. The spring 2 1 will return the 'actuator to its initial position. In this way for each depression of the key lever the actuator is connected to the power drive to efiect a printing mov ement of the type bar. The mechanism thus far described is similar to that of my prior application, Serial No. 732,615, filed August 18, 1924.

It frequently happens that the operator will wish to produce a series of successive movements 0' a particular type bar.- In underscoring, for example, it is common to operate the type bar which carries the dash for producing underscoring To accomplish this result a finger25 is provided with a laterally projecting lug 26 which overlies the forward end of the actuator 17 connected with the particular type bar which carries, the character to be repeated. The finger 25 is secured to a sleeve 27 journaled on-a shaft 28. The shaft 28 in turn is journaled in a bearing 29 carried by a bracket 30 which is mounted on the crossbar 31 for supporting the adjustable screw 23. The sleeve 27 is provided with a forwardly projecting arm 32' having pivotal connectionat 33 with a rearwardly extending arm 34 of a repeat key lever 35. The key lever 35 is pivoted at 36 on a forward extension 37 of the bracket 30. The extension 37 carries a lug 38 which supports a spring 39 for the repeat key lever 35. When the key lever 35 is depressed the lug. 26 will move downwardly to bring the tooth 18 into engagement with the rotatingcylinder 11. The actuator 17 will then be carried forwardly and downwardly to operate the type bar 12. When the actuator strikes the adjustable screw 23 it will be freed from the rotating cylinder and Will be drawn up by the-spring 24 into contact with the lug 26 and will then be slid back until the tooth 18 again engages one of the teeth of the cylinder 11. This operation will be repeated so long as the repeat-key is held in its de-' pressed position. In this way the type bar may be repeatedly operated as many times as desired by simply depressing the repeat It may be desirable to be able to repeat the operation of a plurality of type bars. This may be done by providing repeat keys for as many type bars as it is desirable to operate in this way. In the embodiment shown in the drawing, two repeat keys are shown. The repeat key 40 is connected through the arm 41 directly to the rock shaft 28 and a finger 42 is secured to the rock shaft 0 posite the particular actuator 43 correspon ng to the additional type bar equipped wlth repeat mechanism. Sto 44 are provlded on the extension 37 of t e bracket 30 to limit the movement of the repeat key 40. The movement of the repeat key 35 may be limited by a notch 45 in the finger 25 WhlCh engages a fixed plate 46. Iclaim:--. o 1. In a typewriter, a type bar, a rotary toothed ower drive, an actuator connected with said type bar, a key-lever for moving said .actuator into engagement with said power drive, a stop for disengaging said actuator from said power drive at the close of a printing operation, a spring for restoring said actuator after disengagement from said power drive an arm having a projection thereon overl ing saidactuator, and a key lever for movlng said arm to bring said projection into posltion to guide said actuator mto re-engagement with said ower drive after each disengagement thereo at the close of a printing operation.

2. In a typewriter, a type bar, a drive, an actuator for connecting sai type bar with said power drive to effect a print ing operation, means for disconnecting said actuator from said power drive at the close of a printing operat on, means for causing sa d actuator to re-engage said power drive for repeating said printing operation, a rock shaft on which said last-named means is mounted, a pivoted key lever for moving said last-named means about said rock shaft, and stops for limiting the movements of said key lever.

3. The combination with a typewriter having a type bar, a power drive, and an actuator for connecting said type bar with said power drive, of repeat key mechanism comprising a rock shaft, an arm connected with said rock shaft for re-engaging said actuator with said power drive after successive operations of said type bar, and a repeat keyfor oscillating said rock shaft.

4. The combination with a typewriter having type bars, a power drive, and actuators for connecting said type bars with said power ators to produce successive o drive, of repeat key mechanism comprising a rock shaft, a sleeve journaled on said rock shaft, repeat keys connected with said rock shaft and sleeve, respectively, and means connected with said sleeve and rock shaft, re'-' spectively, for engaging said separate acturations of said type bars when a repeat key 1s depressed.

5. In a typewriter, the combination with a type bar, of a power drive, an actuator for connecting said power drive with said type bar, a stop for disengaging said actuator from said power drive at the close of a printing opower Lava-tot eration, means for restoring said actuator after dlsconnection, a ke lever, means operated b sai key lever or effecting connection 0 said actuator with said power drive, means for engagin said actuator to' guide it into connection with said power drive when moved by said restorin means, and a repeat 7 key for controlling sai engaging means 1nsition, where y the actuation of said type bar will be repeated, and means independent of said key lever for positioning said stop to effect such repetition after said key lever has been released. I

p 7. In a ty ewriter, the combination with a type bar, 0 a power drive, an actuator for connecting said type bar with said power drive to effect a printing operation, means for disconnecting said actuator from said power drive at the close of the printing operation, means including a pivoted lever for causin' said actuator to re-engage said power drive or repeating said printing operation, and a lever pivoted on a, fixed axis for moving said first mentioned lever on its axis to effect the repeating operation.

8. In a typewriter, the combination with a type bar, of a power drive, an actuator connected to said type bar, means for connecting said actuator to said power drive, means for automatically disconnecting said actuator from said power drive, and repeat key mecha- 

